Upright portable electric heater



FIG. 1 is a perspective view of an upright portable electric heater showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a side elevational view thereof.

The rear surfaces of the heater are substantially flat and unornamented. 

The ornamental design for an upright portable electric heater, as shown and described. 